Muting device of upright piano

Details Muting device of upright piano Muting device of upright piano

1991-06-25

1993-03-23

Witkowski, Stanley J.

Music

Instruments

Stringed

84236, G10C 318

Patent

active

051966387

ABSTRACT:
A muting device of an upright piano which includes butt, a wippen, a capstan button and a muting mechanism (15). This butt rotates with a hammer which strikes a string of the upright piano. In addition, a jack is provided to come in contact with a lower surface of the butt, and rotates the butt in response to displacement of the key. The jack is supported by the wippen such that it can freely rotate. The capstan button is provided at a back edge portion of the key to transmit displacement of the key to the wippen. The muting mechanism is designed to reduce a string-striking stroke by rotating the hammer. Further, there is provided a key-displacement-transmission-rate changing mechanism. When reducing the string-striking stroke by the muting mechanism, this mechanism raises a displacement transmission point, at which displacement of the key is transmitted to the wippen, toward a rotation center of the key from the capstan button. Preferably, this mechanism includes another capstan button which is placed on an upper surface of the key at a position between the capstan button and rotation center of the key.

REFERENCES:
patent: 4061067 (1977-12-01), Carbone
patent: 4161129 (1979-07-01), Carbone
patent: 4860626 (1989-08-01), Tanaka et al.
patent: 5042354 (1991-08-01), Trivelas et al.

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